A method, system, device, and medium for starting on teeth for a two-speed hybrid transmission

Abstract

The present disclosure relates to a two-gear hybrid box starting gear method, system, device and medium, the method comprising the following steps: starting in pure electric mode, monitoring the torque request of the HCU to the EM2 motor by the MCU; when the torque request of the HCU to the EM2 motor changes from 0Nm, the MCU temporarily does not execute the torque request of the HCU to the EM1 motor, and instantaneously controls the EM1 motor to output a corresponding preset torque; when the torque request of the HCU to the EM1 motor exceeds the corresponding preset range, the MCU exits the torque control mode of the EM1 motor and resumes executing the torque request of the HCU. The present disclosure controls the dual-motor controller without affecting the original various functions, controls the torque response of the EM1 motor by the MCU, and eliminates the gear tooth noise generated during vehicle starting.

Description

Technical Field

[0001] This disclosure belongs to the field of automotive control technology, and in particular relates to a method, system, device and medium for starting a two-speed hybrid gearbox. Background Technology

[0002] Against the backdrop of energy crisis and environmental pollution, new energy vehicles have become a research hotspot worldwide. Plug-in hybrid electric vehicles (PHEVs) account for an increasingly larger share of the new energy vehicle market. Compared to pure electric vehicles, PHEVs have more complex overall vehicle control, and NVH (Noise, Vibration, and Harshness) issues are more prominent. From a working principle perspective, PHEVs can operate in series, parallel, and even engine-driven direct-drive modes, making their transmission systems undoubtedly more complex than those of pure electric vehicles. Currently, PHEV hybrid transmissions include three-stage (3DHT), two-stage (2DHT), and one-stage (1DHT) hybrid systems. NVH issues remain a significant challenge for the industry. The 2DHT system, which balances economy and power and is compatible with various engine types, represents a promising research direction for addressing NVH problems.

[0003] 2DHT hybrid box structure as follows Figure 2 As shown, ENG represents the engine, EM1 represents the generator (ISGF motor), and EM2 represents the drive motor (TMF motor).

[0004] In pursuit of power, the industry practice for 2DHT plug-in hybrid vehicles is as follows: starting in D or R gear is in EV (pure electric) mode, with the hybrid gearbox in first gear, selecting two motors to output torque. However, to balance power smoothness and fuel consumption, the vehicle control unit (HCU) sends a torque command to the MCU, first activating the EM2 motor to output torque, and then activating the EM1 motor after about 0.6 seconds, as shown in Figure 3. Figure 3a For the request type name, Figure 3bThis is the original design's starting power output curve, where HCU_ISGF_ModeReq represents the EM1 motor mode request sent by the vehicle controller to the motor controller; HCU_ISGF_TorqSet represents the EM1 motor torque request sent by the vehicle controller to the motor controller; ISGF_ModeReq represents the actual EM1 motor mode; ISGF_TorqAct represents the actual EM1 motor torque; HCU_TMF_ModeReq represents the EM2 motor mode request sent by the vehicle controller to the motor controller; HCU_TMF_TorqSet represents the EM2 motor torque request sent by the vehicle controller to the motor controller; TMF_ModeReq represents the actual EM2 motor mode; TMF_TorqAct represents the actual EM2 motor torque; VehicleSpeedVSOSig represents the vehicle speed; and dt represents the time difference between the EM2 and EM1 torque outputs.

[0005] This design introduces a starting noise issue. When the vehicle is stationary, the moment the EM2 motor outputs torque, the torque is transmitted to the gear chain of the EM1 motor via gear transmission. This can be understood as the EM2 motor dragging the gears on the EM1 motor side. Due to the long transmission path and the initial gap in the EM1 motor gear chain, the speed and force of the meshing gears change uncontrollably, producing a grinding noise. After 0.6 seconds, the EM1 motor outputs torque again, changing from the "dragged party" to the "driving party." The tooth surfaces of the gears on the EM1 motor side interchange, producing another grinding noise.

[0006] Therefore, it is necessary to provide a new two-speed hybrid gearbox starting method, system, device, and medium to solve the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this disclosure is to provide a two-speed hybrid gearbox starting gear method, system, device, and medium to solve the above-mentioned problems.

[0008] This disclosure achieves the above objectives through the following technical solutions:

[0009] A starting gear method for a two-speed hybrid transmission includes the following steps:

[0010] When starting in pure electric mode, the torque request of the drive motor EM2 is monitored by the vehicle controller HCU through the dual motor controller MCU.

[0011] When the torque request of the vehicle controller HCU to the drive motor EM2 changes from 0 Nm, the dual motor controller MCU temporarily suspends the torque request of the vehicle controller HCU to the generator EM1, and instantly controls the generator EM1 to output the corresponding preset torque.

[0012] When the torque request from the vehicle controller HCU to the generator EM1 exceeds the corresponding preset range, the dual motor controller MCU exits the control mode corresponding to the torque of the generator EM1 and resumes executing the torque request from the vehicle controller HCU.

[0013] As a further optimization of this disclosure, starting in pure electric mode includes starting in D or R gear.

[0014] As a further optimization of this disclosure, it includes:

[0015] When starting in D gear, the dual-motor controller MCU monitors the torque request of the vehicle controller HCU to the drive motor EM2;

[0016] When the torque request from the vehicle controller HCU to the drive motor EM2 changes from 0 Nm to greater than 0 Nm, the dual motor controller MCU temporarily stops executing the torque request from the vehicle controller HCU to the generator EM1, and instantly controls the generator EM1 to output positive torque, so that the torque increases rapidly from 0 Nm to 2 Nm.

[0017] When the vehicle controller HCU requests a torque of ≥2Nm from the generator EM1, the dual motor controller MCU exits the 2Nm torque control mode of the generator EM1 and resumes executing the torque request of the vehicle controller HCU.

[0018] As a further optimization of this disclosure, it includes:

[0019] When starting in reverse gear, the dual-motor controller MCU monitors the torque request of the vehicle controller HCU to the drive motor EM2.

[0020] When the torque request from the vehicle controller HCU to the drive motor EM2 changes from 0 Nm to less than 0 Nm, the dual motor controller MCU temporarily stops executing the torque request from the vehicle controller HCU to the generator EM1, and instantly controls the generator EM1 to output negative torque, so that the torque decreases rapidly from 0 Nm to -2 Nm.

[0021] When the vehicle controller HCU requests torque ≤ -2Nm from the generator EM1, the dual motor controller MCU exits the -2Nm torque control mode of the generator EM1 and resumes executing the torque request of the vehicle controller HCU.

[0022] A two-speed hybrid transmission starting gear system includes:

[0023] The torque request monitoring module is used for starting in pure electric mode. It monitors the torque request of the drive motor EM2 by the vehicle controller HCU through the dual motor controller MCU.

[0024] The instantaneous control module is used to, when the torque request of the vehicle controller HCU to the drive motor EM2 changes from 0 Nm, cause the dual motor controller MCU to temporarily suspend the torque request of the vehicle controller HCU to the generator EM1, and instantaneously control the generator EM1 to output the corresponding preset torque.

[0025] The control mode recovery module is used to cause the dual motor controller MCU to exit the control mode corresponding to the torque of the generator EM1 and resume the execution of the torque request of the vehicle controller HCU when the torque request of the generator EM1 by the vehicle controller HCU exceeds the corresponding preset range.

[0026] As a further optimization of this disclosure, starting in pure electric mode includes starting in D or R gear.

[0027] As a further optimization of this disclosure, when starting in D gear, the torque request monitoring module monitors the torque request of the vehicle controller HCU to the drive motor EM2 through the dual motor controller MCU;

[0028] When the torque request from the vehicle controller HCU to the drive motor EM2 changes from 0 Nm to greater than 0 Nm, the instantaneous control module causes the dual motor controller MCU to temporarily suspend the torque request from the vehicle controller HCU to the generator EM1. The instantaneous control module then instantly controls the generator EM1 to output positive torque, causing the torque to rapidly increase from 0 Nm to 2 Nm.

[0029] When the vehicle controller HCU requests a torque of ≥2Nm from the generator EM1, the control mode recovery module causes the dual motor controller MCU to exit the 2Nm torque control mode of the generator EM1 and resume executing the torque request of the vehicle controller HCU.

[0030] As a further optimization of this disclosure, when starting in R gear, the torque request monitoring module monitors the torque request of the vehicle controller HCU to the drive motor EM2 through the dual motor controller MCU;

[0031] When the torque request from the vehicle controller HCU to the drive motor EM2 changes from 0 Nm to less than 0 Nm, the instantaneous control module causes the dual motor controller MCU to temporarily suspend the torque request from the vehicle controller HCU to the generator EM1. The instantaneous control module then instantly controls the generator EM1 to output negative torque, causing the torque to decrease rapidly from 0 Nm to -2 Nm.

[0032] When the vehicle controller HCU requests torque ≤ -2Nm from the generator EM1, the control mode recovery module causes the dual motor controller MCU to exit the control mode for the generator EM1 with a torque of -2Nm and resume executing the torque request from the vehicle controller HCU.

[0033] An electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0034] Memory, used to store computer programs;

[0035] The processor, when executing the program stored in the memory, implements the two-speed hybrid transmission start-up gear method.

[0036] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the two-speed hybrid transmission start-up gear method.

[0037] The beneficial effects of this disclosure are as follows:

[0038] The starting strategy disclosed herein avoids the EM1 motor side gear being dragged, keeping the EM1 motor always in the "driving" position. There is also no tooth surface interchange between gears. The torque magnitude and speed of the teeth can be controlled by calibrating the torque response speed of the EM1, which can solve the two abnormal noises generated in the original starting design. In addition, the advantage of this strategy is that it only applies a 2Nm torque to the EM1 motor at the moment of starting, and then stops to continue executing the torque request of the HCU. The impact on energy consumption is negligible, and the 2Nm torque is gradually increased, so it has no impact on the smoothness of power delivery. Attached Figure Description

[0039] Figure 1 This is a flowchart of the method disclosed herein;

[0040] Figure 2 This is a simplified structural diagram of the current 2DHT hybrid gearbox in the background technology disclosed herein;

[0041] Figure 3a This is a schematic diagram of the request type names in the background technology of this disclosure;

[0042] Figure 3b This is the original design starting power output curve diagram in the background technology of this disclosure;

[0043] Figure 4 This is a power output curve for starting in D gear according to an embodiment of this disclosure;

[0044] Figure 5This is a graph showing the starting power output curve of R gear in an embodiment of this disclosure;

[0045] Figure 6 This is a system structure block diagram of an embodiment of this disclosure;

[0046] Figure 7 This is a block diagram of the device structure in an embodiment of this disclosure. Detailed Implementation

[0047] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0048] like Figure 1 As shown, a starting gear method for a two-speed hybrid transmission includes the following steps:

[0049] When starting in pure electric mode, the torque request of the drive motor EM2 is monitored by the vehicle controller HCU through the dual motor controller MCU.

[0050] When the torque request of the vehicle controller HCU to the drive motor EM2 changes from 0 Nm, the dual motor controller MCU temporarily suspends the torque request of the vehicle controller HCU to the generator EM1, and instantly controls the generator EM1 to output the corresponding preset torque.

[0051] When the torque request from the vehicle controller HCU to the generator EM1 exceeds the corresponding preset range, the dual motor controller MCU exits the control mode corresponding to the torque of the generator EM1 and resumes executing the torque request from the vehicle controller HCU.

[0052] In this embodiment, it specifically includes:

[0053] To avoid abnormal noises during start-up in EV (pure electric) mode, the motor controller (MCU) adjusts the power response request from the vehicle controller (HCU):

[0054] When starting in D gear, the MCU monitors the torque request from the HCU to the EM2 motor. When the torque request from the HCU to the EM2 motor changes from 0 Nm to greater than 0 Nm, the MCU temporarily suspends the torque request from the HCU to the EM1 motor and instantly controls the EM1 motor to output positive torque, with the torque rapidly increasing from 0 Nm to 2 Nm. When the torque request from the HCU to the EM1 motor is ≥2 Nm, the MCU exits the 2 Nm control mode for the EM1 motor and resumes executing the torque request from the HCU. Figure 4 As shown.

[0055] When starting in reverse (R) gear, the MCU monitors the torque request from the HCU to the EM2 motor. When the torque request from the HCU to the EM2 motor changes from 0 Nm to less than 0 Nm, the MCU temporarily suspends the torque request from the HCU to the EM1 motor and instantly controls the EM1 motor to output negative torque, with the torque rapidly decreasing from 0 Nm to -2 Nm. When the torque request from the HCU to the EM1 motor is ≤ -2 Nm, the MCU exits the -2 Nm control mode for the EM1 motor and resumes executing the torque request from the HCU, as follows: Figure 5 As shown.

[0056] like Figure 6 As shown, embodiments of this disclosure provide a two-speed hybrid gearbox start-up gear system, including:

[0057] The torque request monitoring module 11 is used for starting in pure electric mode and monitors the torque request of the vehicle controller HCU to the drive motor EM2 through the dual motor controller MCU.

[0058] The instantaneous control module 12 is used to, when the torque request of the vehicle controller HCU to the drive motor EM2 changes from 0 Nm, cause the dual motor controller MCU to temporarily suspend the torque request of the vehicle controller HCU to the generator EM1, and instantaneously control the generator EM1 to output the corresponding preset torque.

[0059] The control mode recovery module 13 is used to cause the dual motor controller MCU to exit the control mode corresponding to the torque of the generator EM1 and resume the execution of the torque request of the vehicle controller HCU when the torque request of the generator EM1 by the vehicle controller HCU exceeds the corresponding preset range.

[0060] The implementation process of the functions and roles of each module in the above system is detailed in the implementation process of the corresponding steps in the above method, and will not be repeated here.

[0061] For the system embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The system embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this disclosure according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0062] In the above embodiments, any number of modules can be combined into one module, or any one module can be split into multiple modules. Alternatively, at least some of the functionality of one or more of these modules can be combined with at least some of the functionality of other modules and implemented in one module. At least one of all modules can be at least partially implemented as hardware circuitry, such as a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), a System-on-Chip, a System-on-Substrate, a System-on-Package, an Application-Specific Integrated Circuit (ASIC), or any other reasonable means of integrating or packaging circuitry, or implemented in software, hardware, or firmware, or in any suitable combination of any of these three implementation methods. Alternatively, at least one of all modules can be at least partially implemented as a computer program module, which, when run, can perform corresponding functions.

[0063] See Figure 7 The electronic device provided in the embodiments of this disclosure includes a processor 1110, a communication interface 1120, a memory 1130 and a communication bus 1140, wherein the processor 1110, the communication interface 1120 and the memory 1130 communicate with each other through the communication bus 1140.

[0064] Memory 1130 is used to store computer programs;

[0065] When the processor 1110 executes the program stored in the memory 1130, it implements the following two-speed hybrid gearbox start-up gear method.

[0066] The aforementioned communication bus 1140 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus 1140 can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, it is represented by only one thick line in the figure, but this does not indicate that there is only one bus or one type of bus.

[0067] The communication interface 1120 is used for communication between the above-mentioned electronic device and other devices.

[0068] The memory 1130 may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory 1130 may also be at least one storage device located remotely from the aforementioned processor 1110.

[0069] The processor 1110 mentioned above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0070] Embodiments of this disclosure also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program that, when executed by a processor, implements the two-speed hybrid transmission start-up gear method described above.

[0071] The computer-readable storage medium may be included in the device / apparatus described in the above embodiments; or it may exist independently and not assembled into the device / apparatus. The computer-readable storage medium carries one or more programs that, when executed, implement the two-speed hybrid transmission start-up gear method according to the embodiments of this disclosure.

[0072] According to embodiments of this disclosure, the computer-readable storage medium can be a non-volatile computer-readable storage medium, such as including, but not limited to: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this disclosure, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0073] The embodiments described above are merely examples of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent disclosure. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A method of starting on gear for a two-mode hybrid transmission, characterized in that, The method comprises the following steps: starting in the pure electric mode, monitoring the torque request of the drive motor EM2 by the dual-motor controller MCU; when the torque request of the drive motor EM2 changes from 0Nm, the dual-motor controller MCU temporarily does not execute the torque request of the generator EM1, and instantaneously controls the generator EM1 to output the corresponding preset torque; when the torque request of the generator EM1 exceeds the corresponding preset range, the dual-motor controller MCU exits the control mode of the corresponding torque of the generator EM1 and restores the torque request of the vehicle controller HCU; when starting in the D gear, monitoring the torque request of the drive motor EM2 by the dual-motor controller MCU; when the torque request of the drive motor EM2 changes from 0Nm to greater than ONm, the dual-motor controller MCU temporarily does not execute the torque request of the generator EM1, instantaneously controls the generator EM1 to output positive torque, and makes the torque quickly increase from 0Nm to 2Nm; when the torque request of the generator EM1 is greater than or equal to 2Nm, the dual-motor controller MCU exits the control mode of the 2Nm torque of the generator EM1 and restores the torque request of the vehicle controller HCU.

2. The method according to claim 1, characterized in that, Starting in the pure electric mode includes starting in the D gear or the R gear.

3. The method of claim 1, wherein, comprising: when starting in the R gear, monitoring the torque request of the drive motor EM2 by the dual-motor controller MCU; when the torque request of the drive motor EM2 changes from 0Nm to less than ONm, the dual-motor controller MCU temporarily does not execute the torque request of the generator EM1, instantaneously controls the generator EM1 to output negative torque, and makes the torque quickly decrease from 0Nm to -2Nm; when the torque request of the generator EM1 is less than or equal to -2Nm, the dual-motor controller MCU exits the control mode of the -2Nm torque of the generator EM1 and restores the torque request of the vehicle controller HCU.

4. A two-gear hybrid transmission starting gear system, characterized in that, comprising: a torque request monitoring module for starting in the pure electric mode, monitoring the torque request of the drive motor EM2 by the dual-motor controller MCU; an instant control module for, when the torque request of the drive motor EM2 changes from 0Nm, temporarily not executing the torque request of the generator EM1 by the dual-motor controller MCU, and instantaneously controlling the generator EM1 to output the corresponding preset torque; The control mode recovery module is used to cause the dual motor controller MCU to exit the control mode corresponding to the torque of the generator EM1 and resume the execution of the torque request of the vehicle controller HCU when the torque request of the generator EM1 by the vehicle controller HCU exceeds the corresponding preset range. When starting in D gear, the torque request monitoring module monitors the torque request of the vehicle controller HCU to the drive motor EM2 through the dual motor controller MCU. When the torque request of the vehicle controller HCU to the drive motor EM2 changes from 0 Nm to greater than 0 Nm, the instantaneous control module causes the dual motor controller MCU to temporarily suspend the torque request of the vehicle controller HCU to the generator EM1, and the instantaneous control module instantly controls the generator EM1 to output positive torque, so that the torque increases rapidly from 0 Nm to 2 Nm. When the torque request of the vehicle controller HCU to the generator EM1 is ≥2 Nm, the control mode recovery module causes the dual motor controller MCU to exit the 2 Nm torque control mode of the generator EM1 and resume the execution of the torque request of the vehicle controller HCU.

5. The start-on-gear system of a two-gear hybrid transmission according to claim 4, characterized in that, Starting in pure electric mode includes starting in D or R gear.

6. The start-on-gear system of a two-gear hybrid transmission according to claim 4, characterized in that, When starting in reverse gear, the torque request monitoring module monitors the torque request of the vehicle controller HCU to the drive motor EM2 through the dual motor controller MCU; When the torque request from the vehicle controller HCU to the drive motor EM2 changes from 0 Nm to less than 0 Nm, the instantaneous control module causes the dual motor controller MCU to temporarily suspend the torque request from the vehicle controller HCU to the generator EM1. The instantaneous control module then instantly controls the generator EM1 to output negative torque, causing the torque to decrease rapidly from 0 Nm to -2 Nm. When the vehicle controller HCU requests torque ≤ -2Nm from the generator EM1, the control mode recovery module causes the dual motor controller MCU to exit the control mode for the generator EM1 with a torque of -2Nm and resume executing the torque request from the vehicle controller HCU.

7. An electronic device, comprising: It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; The processor, when executing a program stored in the memory, implements the two-speed hybrid gearbox start-up gear method as described in any one of claims 1-3.

8. A computer readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the two-speed hybrid gearbox starting gear method as described in any one of claims 1-3.

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